/Engine/Source/Editor/ViewportInteraction/Public/ViewportWorldInteraction.h
Input
virtual bool InputKey ( [FEditorViewportClient](API\Editor\UnrealEd\FEditorViewportClient) * InViewportClient, [FViewport](API\Runtime\Engine\FViewport) * Viewport, [FKey](API\Runtime\InputCore\FKey) Key, EInputEvent Event )